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| All Patents in class 123/73F | |||||
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| Number | Date | Patentee | Title | Type | |
| 585,434 | Jun. 29, 1897 | W.E. Gibbon | Explosive Engine | internal combustion engines | |
| 1,429,818 | Sep. 19, 1922 | J.F. Woolf, E.J. Woolf | Gas Engine | carburetors | |